Correlation detection apparatus and fourier transform apparatus
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United States of America Patent
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Nov 11, 2008
Grant Date -
Mar 4, 2004
app pub date -
Jun 18, 2003
filing date -
Jun 28, 2002
priority date (Note) -
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Abstract
A correlation detection apparatus which realizes software CDMA inverse-spread processing. A reception circuit receives an RACH preamble from a mobile station, and an A/D converts the preamble into digital received data. An FFT unit FFT-processes the received data to obtain an FFT result. An RACH code storage unit holds an RACH preamble code, and another FFT unit FFT-processes the RACH preamble code to obtain another FFT result. A multiplication unit multiples the FFT result by the other FFT result. An IFFT unit IFFT-processes a result of multiplication input from the multiplication unit to obtain a delay profile. A data decoding unit decodes the received data by using the delay profile, and obtains decoded data.
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